body {
  margin: 0;
}
.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 50px;
}
.background {
  --ripple-x: 0;
  --ripple-y: 0;
  --ripple-color: rgba(0, 0, 0, 0.2);
  --animation-tick: 0;

  width: 100vw;
  height: 100vh;
  font-size: 3rem;
  background-color: rgb(1, 150, 255);
  display: flex;
  justify-content: space-around;
  align-items: center;
  font-family: Arial, Helvetica, sans-serif;
  color: white;
  text-align: center;
  cursor: pointer;
}

.background.animating {
  background-image: paint(ripple);
}